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Bone & Joint Research
Vol. 6, Issue 10 | Pages 577 - 583
1 Oct 2017
Sallent A Vicente M Reverté MM Lopez A Rodríguez-Baeza A Pérez-Domínguez M Velez R

Objectives

To assess the accuracy of patient-specific instruments (PSIs) versus standard manual technique and the precision of computer-assisted planning and PSI-guided osteotomies in pelvic tumour resection.

Methods

CT scans were obtained from five female cadaveric pelvises. Five osteotomies were designed using Mimics software: sacroiliac, biplanar supra-acetabular, two parallel iliopubic and ischial. For cases of the left hemipelvis, PSIs were designed to guide standard oscillating saw osteotomies and later manufactured using 3D printing. Osteotomies were performed using the standard manual technique in cases of the right hemipelvis. Post-resection CT scans were quantitatively analysed. Student’s t-test and Mann–Whitney U test were used.


Orthopaedic Proceedings
Vol. 97-B, Issue SUPP_16 | Pages 73 - 73
1 Dec 2015
Blasco-Mollá M Villalba-Pérez M Salom-Taverner M Rincón-López E Otero-Reigada C
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Salmonella osteomyelitis occurs infrequently in children without a sickle cell disease, and its subacute form is rare. Diagnosis is often delayed because its slow onset, intermittent pain and it can be confused with bone tumors.

An otherwise healthy 13-year-old boy was admitted from another center in order to discard bone tumor in proximal tibia, with compatible radiologic findings. There was no history of trauma or previous illness. Twenty days ago, he had flu symptoms and myalgia.

On the physical examination the child was feverless, showed increased heat over his left knee, considerable effusion and painful restriction of movement. Inflammatory laboratory results revealed erythrocyte sedimentation rate 46mm/h and C-Reactive protein, 11,2 mg/L.

Radiographs revealed a lytic lesion localized in the proximal metaphysis and epiphysis. The MRI showed an area of edema around the lytic lesion and surrounding soft tissues. Images supported the diagnosis of subacute osteomyelitis, (Brodie abscess). Empirically, intravenous cefuroxime was started.

Forty-eight hours post admission, the patient underwent abscess surgical debridement, washout and cavity curettage. Samples were sent for cytology, culture and sensitivity and acid fast bacilli culture and sensitivity.

Collection´s count cell was 173.000/ L white cells. Collection´s culture revealed Salmonella B sensitive to ciprofloxacin. Stool culture did not yield any growth

Intravenous cefuroxime was administered during 10 days. The patient responded well as evidenced by clinical and laboratory improvement He was discharged with his left leg immobilized in a cast during 1 month and treatment was completed with oral ciprofloxacin 500mg /12 h during 2 months. The patient had full range of knee motion after 2 months.

Last reviewed, after two years of the income, he was completed recovered, and the radiograph showed bone healing without physeal neither damage nor limb leg discrepancy.

The most effective therapy of a confirmed salmonella osteomyelitis is a combination of radical operative intervention and targeted intravenous antibiotics as in our case. Faced with a subacute osteomyelitis, we have to remember that it may mimic bone tumors. We highlight the isolation of Salmonella B in a patient without sickle cell disease.


Orthopaedic Proceedings
Vol. 93-B, Issue SUPP_II | Pages 138 - 138
1 May 2011
Llusa-Pérez M Morro-Martí MR Pacha-Vicente D Nardi-Vilardaga J Lluch-Bergadà A Mir-Bullò X
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Objective: To present the experience of a Deparment of Neuroorthopedics in treatment of the severe deformities of the wrist using the technique of the wrist arthrodesis very often associated to other surgical procedures such as musculotendinous lengthenings and transfers.

Materials and Methods: 20 patients with neurological sequelae of cerebral palsy, head trauma, stroke and other neurological disorders of the first motoneuron were retrospectively studied. Fusion of the wrist with an specific plate was performed on these patients.

Results: We reached the consolidation of the arthrodesis in a 100% of the cases between 8 and 12 weeks. We had some complications such as 3 cases of phlictenae and edema and 4 cases needed reoperations because of the appearance of secondary deformities previously not seen. 95% of the patient were satisfied and only one wouldn’t go under the same operation again.

Discusion: Despite many text books contraindicate wrist arthrodesis in patients with neurological sequelae because of the remote possibility that they may need the flexoextensiòn for the use of walker or crutches or manual or electric wheel-chairs, in our experience many patients benefit from this procedure to correct severe deformities that make their hands absolutely dysfunctional. Besides, the intervention provides the patients and their family with benefits in terms of hygiene, dressing, very often improvement of the pain and, why not, of the aesthetics. Some patients have also gained function, passing from a dysfunctional hand to a useful hand for the basic functions of life. Nowadays, for these kind of patients to be able to move one or two fingers, if they are correctly positioned, can be useful to manage a walker, a computer or a motorized wheel-chair.


Orthopaedic Proceedings
Vol. 93-B, Issue SUPP_II | Pages 143 - 143
1 May 2011
Cordero-Ampuero J De Dios-Pérez M Bustillo-Badajoz J González-Fernández E García-Araujo C De Los Santos-Real R
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Introduction: Deep infection continues to be the first most important early complication in knee arthroplasty. It is usual to apply standard prophylaxis to all patients, but it is not usual to use special measures in those of them who present a higher risk. Moreover, sometimes these patients are even not identified.

Purpose: To analyse statistically significant risk factors for deep infection in patients with a knee arthroplasty.

Patients and Methods:

Design: Case-control study.

Observational and retrospective comparison of incidence or prevalence of all risk factors described in the literature. These factors have been classified according to the period of risk in: epidemiologic; pre, intra and postoperative; and distant infections.

Case series: 32 consecutive patients with a deeply infected knee arthroplasty operated in the same Department of a University General Hospital.

Control series: 100 randomly selected patients, operated in the same hospital and period of time, with no deep infection in their knee arthroplasty along follow-up.

Pearson was used for comparison of qualitative variables and ANOVA for quantitative ones.

Results: The following risk factors were significantly more frequent (p< 0.05) in the patients with an infected knee arthroplasty:

Preoperative conditions: previous surgery in the same knee (25% vs 9%), chronic therapy with glucocorticoids (19% vs 4%), immunosuppressive treatments (16% vs 3%), and non-rheumatoid inflammatory arthritis (13% vs 0%). Patients in this case-control did not present a significant difference in the prevalence of rheumatoid arthritis, diabetes, obesity (BMI> 30), chronic liver diseases, or alcohol addiction.

Intraoperative facts: a prolonged surgical time (149 min vs 108 min) and intraoperative fractures. Differences were not found in the amount of bleeding or need for transfusion.

Postoperative events: secretion of the wound longer than 10 days (48% vs 0%), wound haematoma (36% vs 6%), new surgery in the knee (30% vs 0%), and deep venous thrombosis in lower limbs (10% vs 1%).

Distant infections (risk for haematogenous seeding): deep cutaneous (27% vs 3%), generalized sepsis (7% vs 0%), upper and lower urinary tract (27% vs 5%), pneumonias and bronchopneumonias (27% vs 5%), and diverse abdominal focus (17% vs 1%). On the contrary, significant differences were not found in the prevalence of severe oral or dental infections.

Epidemiologic characteristics: significant differences were not found in gender or in the prevalence of any aetiology.

Conclusion: To identify significative risk factors for deep infection in knee arthroplasty is important:

to control and minimize these risk factors when present

when this is not possible not possible, to implement additional prophylactic measures.


Orthopaedic Proceedings
Vol. 93-B, Issue SUPP_II | Pages 144 - 144
1 May 2011
Cordero-Ampuero J De Dios-Pérez M Martín-García R Martínez-Vélez D Noreña-González I De Los Santos-Real R
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Introduction: Deep infection continues to be the second most important early complication in hip arthroplasty. It is usual to apply standard prophylaxis to all patients, but it is not usual to use special measures in those of them who present a higher risk. Moreover, sometimes these patients are even not identified.

Purpose: To analyse statistically significant risk factors for deep infection in patients with a hip arthroplasty

Patients and Methods:

Design: Case-control study.

Observational and retrospective comparison of incidence or prevalence of all risk factors described in the literature. These factors have been classified according to the period of risk in: epidemiologic; pre, intra and postoperative; and distant infections.

Case series: 47 consecutive patients with a deeply infected hip arthroplasty operated in the same Department of a University General Hospital.

Control series: 200 randomly selected patients, operated in the same hospital and period of time, with no deep infection in their hip arthroplasty along follow-up.

Pearson was used for comparison of qualitative variables and ANOVA for quantitative ones.

Results: The following risk factors were significantly more frequent (p< 0.05) in the patients with an infected hip arthroplasty:

Epidemiologic characteristics: female gender, post-traumatic osteoarthritis (17% vs 3%). On the contrary, primary osteoarthritis is a “protective” factor.

Preoperative conditions: previous surgery in the same hip (60% vs 6%), obesity (BMI> 30) (9% vs 1%), chronic therapy with glucocorticoids (13% vs 0%), immunosuppressive treatments, chronic liver diseases (20% vs 2%), alcohol addiction (13% vs 0%) and intravenous drug abuse. Patients in this case-control did not present a significant difference in the prevalence of diabetes (a recognised risk factor for spine and knee surgery) or rheumatoid arthritis.

Intraoperative facts: a prolonged surgical time is the only significant risk factor (133 min vs 98 min), but differences were not found in the amount of bleeding, need for transfusion or intraoperative fractures.

Postoperative events: secretion of the wound longer than 10 days (46% vs 8%), palpable deep haematoma (27% vs 1%), dislocation of the prosthesis (40% vs 6%), and need for new surgery in the hip (21% vs 1%).

Distant infections (risk for haematogenous seeding): deep cutaneous (30% vs 8%), upper and lower urinary tract (36% vs 2%), pneumonias and bronchopneumonias (23% vs 5%), and diverse abdominal focus (14% vs 3%). On the contrary, significant differences were not found in the prevalence of severe oral or dental infections.

Conclusion: To identify significative risk factors for deep infection in hip arthroplasty is important:

to control and minimize these risk factors when present

when this is not possible not possible, to implement additional prophylactic measures.


Orthopaedic Proceedings
Vol. 91-B, Issue SUPP_III | Pages 443 - 443
1 Sep 2009
Pérez M Desmarais-Trépanier C Vendittoli P Lavigne M García-Aznar J Doblaré M
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Hip Resurfacing (HR) is nowadays widely used as an alternative to Total Hip Replacement (THR), especially for the young and active patients. Because of the more physiological distribution of the load in the femur, this technique is particularly known to reduce bone loss due to stress shielding behaviour, a major problem encountered with THA. Different computational studies have analysed the performance of HR prostheses. Therefore, the purpose of this study is to apply a computational approach, in fact a bone remodelling analysis, in order to investigate its application to evaluate the bone structure changes postoperatively.

A Finite Element model was developed of a femur with HR prosthesis. The model was reconstructed starting with the femur medical images, and then the prosthesis was positioned in the clinical implantation angle (5° valgus). A cement mantle thickness of 1mm was included. Then a Finite Element Analysis in combination with a bone remodelling model (bone material properties) was performed. The results obtained predict as there is a certain bone loss in the superolateral and inferior medial zone. Additional bone material apposition is locally found with the aim of fixing the implant stem on the medial side, but also a remarkable distal ingrowth around the stem tip. All these findings are in good qualitative agreement with clinical observations.

We conclude that the numerical simulation used in this study is a useful tool in predicting bone remodelling inside a cemented HR prosthesis. This kind of methodologies will help on the design of devices, surgical techniques, etc.


Orthopaedic Proceedings
Vol. 88-B, Issue SUPP_I | Pages 192 - 192
1 Mar 2006
Pérez-Ubeda M Otero O Lòpiz Morales Y de Francisco Marugán B Martínez M Lòpez-Durán F Stern L
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Introduction and objectives: This is a complex type of lesion that is frequently confused with Monteggia fracture. The objective of this paper is to analyse the experience of the Hospital Cl co San Carlos, in Madrid, in the management of the transolecranon fracture-dislocation of the elbow.

Methods and material: Between 1988 and 2001 a total of 23 cases have been revised, 7 of them presenting an oblique simple fracture of the olecranon and the other 16 cases with a comminute one (with fracture of the coronoid process in 9 patients). There was also a radial head fracture associated in 7 patients. Two cases showed ulnar nerve palsy before surgery. Fifthteen of the 21 cases were males and 8 females, with a mean age of 37, 3 years (range: 17–71). The mean follow up was of 56 months (range: 22–122 months). The etiology was a traffic accident (bicycle, motorbike, car) in the 47, 6%, a casual fall in the 23, 8%, a sport accident in the 14, 2% and a precipitation in the 9, 5%. All of them were treated with open reduction and internal fixation, with plate and screws in 17 cases and tension-band wiring in 4 patients. When a radial head fracture was associated, reconstruction was performed with screws in 5 cases and radial head excision in 1 case. Anatomic reduction was achieved in 11 cases.

Results: With the scale of Broberg and Morrey, excellent result was obtained in 6 cases, good in 8, fair in 6, and poor in the remaining 3. The most frequent complication was loss of motion (6 cases), followed by non-union in 2 cases (with hardware fatigue failure in 1 of them) and infection in other case. The two cases with preoperative ulnar nerve palsy resolved over a period of 4 months. Eleven patients needed a reoperation, performing a new internal fixation with bone grafting in 2 cases, a radial head prosthesis implanting in 1 case, and hardware removal in 8 cases.

Discussion and Conclusions: Although the transolecra-non fracture-dislocation of the elbow can be included in several classifications (AO, de Cotton, de Schatzker, etc.), none of them accommodate it satisfactorily, because of the complexity of the lesion. Our results show a statistically significative relation (p < 0.05) between the anatomic reduction obtained and excellent or good results and a high frequency of joint stiffness in this severe lesion.